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<br />, <br /> <br />, <br /> <br />~ <br /> <br />INTRODUCTION <br />The first attempt to layout a town site of 640 acres at Denver <br /> <br />was made in 1858. By 1960, metropolitan Denver had grown in area to <br /> <br /> <br />164,000 ac~es of urbanized land. It is anticipated that by the year <br /> <br /> <br />2000, urbanized land in metropolitan Denver will total 375,000 acres. <br /> <br /> <br />To plan effectively for the future and avoid the hazards of floods, <br /> <br /> <br />community planners must have information on flood potentials and areas <br /> <br /> <br />subject to flooding. This report summarizes Volume I of the Denver <br /> <br /> <br />metropolitan region flood plain information report, which presents <br /> <br /> <br />detailed 'information for the South Platte River from Waterton, Colorado, <br /> <br /> <br />to Brighton, Colorado. Copies of Volume I, which has been published in a <br /> <br /> <br />limited quantity, are on file in the office of the District Engineer, <br /> <br /> <br />U. S. Army Engineer District, Omaha, Nebraska; the Inter-County Regional <br />Planning Commission, Denver; and the Colorado Water Conservation Board, <br /> <br /> <br />Denver; and are available for inspection. Flood plain information <br /> <br /> <br />regarding tributary streams in the metropolitan area will be published <br /> <br /> <br />as the pertinent studies are completed. <br /> <br />DEFINITIONS <br /> <br /> <br />;" The flood plain is the area adjacent to the .ormal channel of a <br /> <br /> <br />stream which is subject to flooding when stream flow exceeds the capacity <br /> <br /> <br />of the chaanel. In terms of risk, the extent of flooding on the plain <br /> <br /> <br />varies fro~ the extreme limits of flooding resulting from the maximum <br /> <br /> <br />probable stream discharge to be expected, to limits based on flood <br /> <br /> <br />stages of frequent occurrence. Thus, while the maximum probable flood <br /> <br /> <br />represents a threat of rare occurrence, floods within the range of 5-year <br /> <br /> <br />to lOO-year average recurrence frequency represent risks of repeated <br /> <br />~ <br />